Steam-boiler furnace.



H, (LS. GALL'AGHER. STEAM :BOILER FUBNAOE. APPLIoATIoN :FILED MAY a, 190s.

937,433. y Patented 0t.19,19o9.

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STEAM BOILEB. FURNAGE.

APPLIUATION HLBD MAY a, 190s.

987,433. Patented Oct. 19, 1909.

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HENRY GLLAGr-IER ANI) GEORGE S. GALLAGHER, NEW YORK, N. Y., ASSIGNORS 0F ONE-HALF TO SAID HENRY GALLAGI-IER AND ONE-HALF TO ARCI-IER P. GALLA- GrI-IER, BOTH OF NEW YORK, N. Y.

STEAM-BOILER FUR/NACE.

Speeicaton of Letters Patent.

Patented Get. 19,- 1909.

T o all whom it may concern:

Be it known that we, HENRY GALLAGHER and GEORGE S. GALLAeI-IER, both citizens ofY the United States, and residents of the borough of Manhattan, city, county, and State of New York, `have invented an Improvement in Steam-Boiler Furnaces, of which the following is a specification.

Our invention relates to steam boiler furnaces and particularly to means for effecting and directing drafts of heated air therein with the primary object of utilizing the products of combustion as completely as possible.

In carrying out our invention, we preferably employ in conjunction with the usual boiler, the setting therefor, and in which and beneath the boiler are placed the customary grate bars, above which is a combustion chamber and beneath which is the usual ash pit, an arched shell set or built in the front wall and forming the upper lining to` the fuel opening, the bottom of this arched shell being provided with series of apertures whereby air may be passed therefrom to and over the front central portion of the fire, there being apertures also provided in similar positions in the inner sidesgof the said shell, at or adjacent to the ends thereof, whereby heated air may also be passed from the arched shell over the front portion of the lire at both sides of the fuel door, there being also provided lines in the side and front walls leading from the ends of the said arched shell to the space beneath the grate bars, means for forcing a current of heated air to the ash pit or space beneath the grate bars, a bridge wall having flues therein whereby the heated air from the ash pit may be conveyed to mingle with the products of combustion as they pass over the bridge'wall, the said bridge wall being also provided with ash and soot lines, an arch wall at the rear of the bridge wall to impede the progress of the products of combustion in passing from the furnace, lues similarly situated in each of the said walls with apertures leading therefrom to the combustion chamber and passageways leading therefrom to the ash pit, an air intake hood extending over a portion of the boiler, a pipe aording communication from the interior of the said hood to the ash pit, and means for drawing the heated air from within the said hood and forcing the same under pressure to the ash piu-all of which will be hereinafter more particularly described.

In the drawing, Figure 1 is a partial elevation and central longitudinal section of a steam boiler furnace embodying our present invention. Fig. 2 is a section on line Fig. 1. Fig. 3 isa longitudinal section on .line y, y, Fig. 1. Fig. 4 is a vertical section on line a, a, Fig. 1. Fig. 5 is a perspective view of the arched shell member employed 1n carrying out our invention. Fig. 6 is a similar view of the cover therefor, Fig. 7 is a central cross section through the arched portion of the hollow shell member and Fig. 8 is a section through the end of the same.

Referring particularly to the drawing, we employ as is usual, a boiler shell indicated at 10 which may or may not be provided with the usual tubes 11. At the opposite sides thereof, the boiler is provided with series of lugs or brackets indicated at 12 and by which the same is supported on the side walls 13, 141, respectively forming'part of the boiler inclosure. A rear wall 16 and a front wall 15 are also employed to complete this inclosure and in the front wall as is also customary, there is an opening leading to the ash pit and an opening above the same and separated therefrom by a division plate 17 for the introduction of coal or other fuel to be burned in the furnace.

The fuel opening is provided with a fuel door 18 and the ash pit with an ash door 19.'

We also provide a bridge wall indicated at 20 which by the way is of unusual thickness for the purposes hereinafter specified and the grate bars commonly employed are indicated at 21, the space above which, as will be understood, is the combustion chamber and the space beneath which is the ash pit.-

' In the front wall of the furnace and preferably immediately above the fuel door thereof and forming the top of the fuel opening, we employ a hollow shell member which is substantially arched and which preferably comprises a channel indicated at 22, which as shown, is arched centrally at 23, the bottom portion of the arch being provided with apertures 24., The end portions of the channel member are preferably straight and in alinement and these portions thereof are indicated at 25 and 26 respectively. On the sides of the channel member are ribs indiand the rib 28 is provided with series of apertures indicated at 29 and 30 respectively. As will be apparent, this arched shell member may be made as hereinbefore described or withthe cover thereof integral with the other parts as shown in Figs. 1 and 2, and in either instance, there will be a passageway completely through the same.

In the side walls of the furnace we provide a'ii flues indicated at 34, one end of each of which communicates with the passageway in the shell member at one end thereof and in the front wall of the furnace we provide the air flues 35 communicating respectively with the air flues 34 in the side walls. Also in the side walls of the furnace, running longitudinally therewith and in similar positions, we employ air flues 36. These air fines 36 are preferably arranged at approximately the top ofthe combustion chamber and extend from the front walls to the rear of the bridge wall yand are each provided with a series of apertures 37 leading therefrom to the fire place and each air flue 36 is provided with a passageway 38 leading therefrom within the side walls to the ash pit or space beneath the grate bars.

In the upper face of the bridge wall we prefer to employ channels extending entirely across the same and each of these channels in its upper portion comprises a perpendicular face 40 and three inclined or sloping faces 39, forming hopper shaped recesses or mouths connecting with soot flues indicated at 41, opening in the back of the bridge wall. Vithin the bridge wall 20 and extending across the same between the hereinbefore named channels and the rear of the wall, we provide an air flue 42 and a series of apertui indicated at 43 extending between the perpendicular face of the said channels andthe air flue 42. In the bridge wall and preferably in the center thereof, we also provide an air Hue 44 providing communication between the air flue 42 and Y theash pit or space beneath the grate bars.

any desired position, preferably in the line of this pipe 46, we employ a blower as at 47, which may be located as indicated or otherwise for the purpose of withdrawing the heated air from the interior of the hood 45 and forcing the same under pressure to the space beneath the grate bars.

As also indicated in Fig. 1, we prefer to employ an arched wall 49 placed at the rear of the bridge wall and this for the purpose of intercepting or Vimpeding the progress of the products of combustion in passing from the tire place to and through the boiler.

It will now be apparent that in the operation of the hereinbefore described boiler structure, the heated air drawn from the interior of the hood by the blower and forced thereby into the ash pit, will be divided into i various air currents, part of which will pass directly through the lire by way of the grate bars, another portion of which will pass by way of the air flues 35 and 34 to the arched shell and therefrom through the apertures 24, 29 and 30, to the front portion of the combustion chamber above the tire to mingle there with the products of combustion, other portions of the heated air go by way of the passageway 3S to the air liues 36 and through the apertures 37 to the fire place at the sides thereof, and still other portions of the heated air will go by the passageway 4.4 to the air flue 42 in the bridge wall and thence by way of the apertures 43 to the channels in the bridge wall to mingle above the bridge wall with the products of coinbustion as the same pass over it.

The products of combustion after passing over the bridge-wall, follow the course indicated by the arrows and pass through the tubes of the boiler and out to the atmosphere or other place of discharge by way of the stack indicated at 50, and these products of combustion are prevented from passing to the chamber within the hood 45 by means of the wall 5l extending upwardly from the arched wall 49 and across the rear of the boiler above the tubular lining.

IVe claim as our invention:

l. In a steam boiler furnace, a boiler, inclosing and supporting walls therefor, grate bars, and a bridge-wall, said bridge wall being provided with; an air flue extending across the same, a hopper shaped recess in the top thereof and forward of the said air flue, a passageway leading from the space beneath the said grate bars to the said air flue, a soot fiue leading from the said hopper shaped recess in the top and to the rear thereof, and a series of apertures leading from the said air iiue to the said hopper shaped recess.

2. In a steam boiler furnace, a boiler, inclosing and supporting walls therefor, grate bars, a bridge-wall, and means for creating a forced dra-ft of heated air to the space beneath the grate bars, the said bridge-wall being provided with; an air flue extending across the same, a hopper shaped recess in the top thereof and forward of the said air flue, a passageway leading from the space beneath the said grate bars to the said air flue, a soot flue leading from the said hop per shaped recess in the top and to the rear thereof, and a series of apertures leading from the said air flue to the said hopper shaped recess.

3. In asteam boiler furnace, a boiler, inclosing and supporting walls therefor, grate bars, and a bridge wall, said bridge wall being provided with; an air flue extending across the same adjacent to the top and rear thereof, a plurality of hopper shaped recesses in the top of the bridge wall and forward of the said air flue, the face of each of the said recesses adjacent to the said air flue being vertical, a passageway leading from the space beneath the said grate bars to the said air flue, soot iues, each of which extends from one of the said hopper shaped recesses in the top and to the rear and adjacent to the bottom thereof, and a series of apertures leading from the said air flue to the said hopper shaped recesses.

4. In a steam boiler furnace, a boiler, inclosing and supporting walls therefor, grate bars, a bridge wall, and means for creating a forced draft of heated air to the space beneath the grate bars, the said bridge wall being provided with; an air flue extending across the same adjacent to the top and rear thereof, a plurality of hopper shaped recesses in the top of the bridge wall and forward of the said air flue, the face of each of said recesses adjacent to the said air flue being vertical, a passageway leading from the space beneath the said grate bars to the said air flue, soot lues, each of which extends from one of the said hopper' shaped recesses in the top and to the rear and adjacent to the bottom thereof, and a series of apertures leading from the said air flue to the said hopper.A shaped recesses.

5. In a steam boiler furnace, a boiler, inclosing and supporting walls therefor, grate bars, a bridge wall, a hood extending over the top of a portion of the said boiler and providing aheated chamber between the same and the said boiler, and means for conveying the heated air from the said chamber to the space beneath the grate bars, the said bridge wall being provided with; an air iiue extending across the same adjacent to the top and rear thereof, a plurality of hopper shaped recesses in the top of the bridge wall and forward of the said air flue, the face of each of said recesses adjacent to the said air flue being vertical,xa passageway leading from the space beneath the said grate bars to the said vair flue, soot flues, each of which extends from one of the said hopper shaped recesses in the top and to the rear and adjacent to the bottom thereof, and a series of apertures leadinglfroin the said air Hue to the said hopper shaped recesses.

Signed by us this 24th day of April, 1908.

HENRY GALLAGHER. GEORGE SVGALLAGHEB.

Witnesses ARTHUR H. SERRELL, BnRTHA M. ALLEN. 

